1. Faculty of Geology, Geophysics and Environmental Protection, AGH University of Science and Technology, Mickiewicza 30, 30-059 Kraków, Poland
2. Department of Earth and Environmental Sciences, University of Ottawa, 140 Louis Pasteur, Ottawa, Ontario K1N 6N5, Canada
3. Faculty of Geology, Geophysics and Environmental Protection, AGH University of Science and Technology, Mickiewicza 30, 30-059 Kraków, Poland, and Department of Earth Sciences, Uppsala University, Villavägen 16, 752-36 Uppsala, Sweden
4. Department of Earth Sciences, Uppsala University, Villavägen 16, 752-36 Uppsala, Sweden
5. Department of Earth and Environmental Sciences, University of Iowa, 115 Trowbridge Hall, Iowa City, Iowa 52242, USA
6. Department of Earth Sciences, Dartmouth College, 6105 Fairchild Hall, Hanover, New Hampshire 03755, USA